1 Explain that a population pyramid shows the age and sex structure of a population. 2  Point to the horizontal bars, which show the percentage (or the absolute number) of males and females in each age group. 3  Have students interpret the chart.
1 Although they range from $150-$400 or more, a large capacity (25-70 pints) dehumidifier for a basement (the dampest portion of most homes) or other large area averages $200-$300.
The expected life of your dehumidifier will depend on usage and maintenance. In general, they last about six to nine years.he expected life of your dehumidifier will depend on usage and maintenance. In general, they last about six to nine years.